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> I create one error type per function/action

I do too! I've been debating whether I should update SNAFU's philosophy page [1] to mention this explicitly, and I think your comment is the one that put me over the edge for "yes" (along with a few child comments). Right now, it simply says "error types that are scoped to that module", but I no longer think that's strong enough.

[1]: https://docs.rs/snafu/latest/snafu/guide/philosophy/index.ht...

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Just wanted to say, you single handedly made me a rust programmer.

Your answers on stack overflow and your crates have helped me so much. Thank you!

You are quite welcome; thanks for the kind words!

I accept, however this requires to create many types with corresponding implementations (`impl From`, `impl Display`, ...). This is a lot of boilerplate.

In addition to the sibling comment mentioning thiserror, I also submit my crate SNAFU (linked in my ancestor comment). Reducing some of the boilerplate is a big reason I enjoy using it.

thiserror automates all of that: https://docs.rs/thiserror/latest/thiserror/ Highly recommended.

Sure, but it's an additional dependency. I would prefer it if some of this machinery were added to `core`.

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